Paper 26.2 API available — start 26.2 migration

[uema5a]

Paper has published a 26.2 paper-api build: 26.2-snapshot-1.build.2-alpha.

Note on version format: The MC 26.2 snapshot cycle uses the scheme 26.2-snapshot-1.build.N-alpha (not 26.2.x.build.N). Confirmed via paperweight.paperDevBundle("26.2-snapshot-1.build.2-alpha") in FancyInnovations/FancyPlugins — this resolves against PaperMC's Maven repo at build time, so the artifact is published. Direct Maven metadata check was unavailable due to environment network policy.

Start 26.2 support on the 26.2 branch:

• build.gradle.kts: compileOnly("io.papermc.paper:paper-api:26.2-snapshot-1.build.2-alpha")
• runServer { minecraftVersion("26.2-snapshot-1") }
• paper-plugin.yml: api-version: '26.2'
• protocol-version: follow upstream sakura-ryoko/syncmatica's 26.2 mod_version when available
• rebuild (./gradlew build) + boot smoke test + ideally a live Fabric client test

Auto-filed by the daily 'Watch Paper 26.2 API release' routine.

[uema5a]

Pushed the bump to the 26.2 branch (68c3db5).

One correction on the version string: the snapshot-era coordinate in the description (26.2-snapshot-1.build.2-alpha) is stale now that 26.2 has actually released. The current alpha on Maven is 26.2.build.15-alpha, so that's what I pinned.

Done:

• build.gradle.kts -> paper-api:26.2.build.15-alpha
• runServer { minecraftVersion("26.2") }
• paper-plugin.yml -> api-version: '26.2'
• ./gradlew build green (compile + tests pass)

Still open:

• protocol-version: waiting on upstream sakura-ryoko/syncmatica's 26.2 mod_version
• boot smoke test + a live Fabric client run

No code changes were needed. Brigadier, the plugin-messaging API and Adventure are all unchanged in 26.2, and the NMS members RawChannel reflects into (Identifier.parse, DiscardedPayload(Identifier, byte[]), ClientboundCustomPayloadPacket, CraftPlayer#getHandle, ServerPlayer.connection, send(Packet)) are all still present in the 26.2 server jar (checked with javap). Only alpha builds exist so far, so the pin will want bumping once a stable build is out.